[vsnet-grb-info 517] IPN triangulation of GRB021025 (annulus)

[GCN Circulars <gcncirc@lheawww.gsfc.nasa.gov>]

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  1656
SUBJECT: IPN triangulation of GRB021025 (annulus)
DATE:    02/10/26 01:37:30 GMT
FROM:    Kevin Hurley at UCBerkeley/SSL  <khurley@sunspot.ssl.berkeley.edu>

K. Hurley and T. Cline, on behalf of the Ulysses and HETE
GRB teams, and

G. Ricker, J-L Atteia, N. Kawai, D. Lamb, S. Woosley, J. Doty, R.
Vanderspek,  J. Villasenor, G. Crew, G. Monnelly, N. Butler, J.G.
Jernigan, A.  Levine, F. Martel, E. Morgan, G. Prigozhin, J. Braga, R.
Manchanda, G. Pizzichini, Y. Shirasaki, C. Graziani, M. Matsuoka, T.
Tamagawa, K. Torii, T. Sakamoto, A. Yoshida, E. Fenimore, M. Galassi,
T. Tavenner, T. Donaghy, M. Boer, J-F Olive, and J-P Dezalay, on behalf
of the HETE GRB team, report:

Ulysses and HETE-FREGATE observed this burst at 73109 s.
As observed by Ulysses, it had a duration ~10 s, a 25-100 keV
fluence of ~1E-6 erg/cm2, and a peak flux over 0.25 s of
~5E-7 erg/cm2 s.  We have triangulated it to a preliminary
annulus centered at RA, Decl=178.652, +35.689 degrees, with
radius 73.524 +/- 0.111 degrees (3 sigma).

At this point it is not clear whether this event was
observed by Mars Odyssey and thus whether an error box
can be derived for it.

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